(under subclass 312) Subject matter comprising means engaging and positioned at least in part by the chimney and cooperable therewith to improve or insure the proper functioning of the chimney other than means to support or hold the chimney in place.
SEE OR SEARCH THIS CLASS, SUBCLASS:
314, for means to support or hold the chimney relative to the light source.
379, for smoke bells.
380, for spark arrestors.
SEE OR SEARCH CLASS
126, Stoves and Furnaces, 258, for heater chimney with article support.
